Index: Ringtoets/Common/src/Ringtoets.Common.Forms/PresentationObjects/FailureMechanismContributionContext.cs
===================================================================
diff -u -r1d1714a744afa41c6da4d755e44d16f4dca7a355 -r438a524144f283209902ae89f058a134380c9538
--- Ringtoets/Common/src/Ringtoets.Common.Forms/PresentationObjects/FailureMechanismContributionContext.cs	(.../FailureMechanismContributionContext.cs)	(revision 1d1714a744afa41c6da4d755e44d16f4dca7a355)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/PresentationObjects/FailureMechanismContributionContext.cs	(.../FailureMechanismContributionContext.cs)	(revision 438a524144f283209902ae89f058a134380c9538)
@@ -40,7 +40,10 @@
         public FailureMechanismContributionContext(FailureMechanismContribution wrappedContribution, IAssessmentSection contributionOwner)
             : base(wrappedContribution)
         {
-            AssertInputsAreNotNull(contributionOwner);
+            if (contributionOwner == null)
+            {
+                throw new ArgumentNullException("contributionOwner");
+            }
 
             Parent = contributionOwner;
         }
@@ -49,13 +52,5 @@
         /// Gets the assessment section to which <see cref="WrappedObjectContextBase{T}.WrappedData"/> belongs to.
         /// </summary>
         public IAssessmentSection Parent { get; private set; }
-
-        private void AssertInputsAreNotNull(IAssessmentSection contributionOwner)
-        {
-            if (contributionOwner == null)
-            {
-                throw new ArgumentNullException("contributionOwner", "Assessment section cannot be null.");
-            }
-        }
     }
 }
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